If you’re even slightly interested in filmmaking, you’ve almost probably heard of the term ‘green screen,’ but have you heard of ‘blue screens?’ There are a few differences between blue and green screens, which we will explain in detail in this article.
Although blue screen backgrounds are slightly less popular than green screen backgrounds, they are both commonly used in the industry. If you’re unfamiliar with how blue or green screen technology works, the distinction between blue and green screens, or why you should use blue or green screen backgrounds, you’ve come to the right place.
Let’s begin by defining chroma key compositing and examining why blue or green are used in the first place. Following that, we’ll discuss variables to consider when selecting a screen color for your next project.
Chroma Key Definition
Chroma key compositing is the process of combining two images depending on their color hues. Each color has a chroma range, which is the origin of the name chroma key. The solid color background works as a matte for your video. You can later remove the solid color background in post-production to make it transparent, allowing for compositing.
Origins of Color
Why are blue and green screens used? Because these are the hues that are the most different from human skin tones. If you look at a color wheel, you’ll see that blue and green are located on the opposite side of the color wheel from where skin tones usually sit.
Wheel of Colors –
Blue and green are the furthest colors apart from human skin tones, making them the most logical option for backgrounds.
Blue screens are used in the film for several reasons. First, the film’s blue channel has the smallest grain, resulting in a smoother matte along the edges and a higher-quality image. Second, when the color blue is exposed to black and white film with blue light, the blue color appears as bright white, which can initiate the composting process with an optical printer. For additional information about blue screens and the visual printing process, see Mark Vargo’s fantastic post about working on the original Star Wars films and his short video Blue Screen 1980.
When filmmaking moved to a digital post-production process, the green screen became popular. That was helped by several things, one of which was the growing popularity of digital cameras. For example, most digital cameras record twice as much information about green as they do about red or blue. The green channel is also used to indicate luminance, making it easier to key out the green in post-production. Green screens also use less light than blue screens do, given that green reflects more light – again, due to its higher brightness. Because it needs less light, it is less expensive to run. Additionally, bright green is a much less common color in costumes and wardrobe, leads to fewer post-production issues.
Which color should you use: blue or green?
so the answer is clear right Green screens beat blue screens. In truth, everything is project-dependent. A green screen is usually better. but This isn’t true in every case. Let’s compare green and blue screens.